20210111112101 has 2 divisors, whose sum is σ = 20210111112102. Its totient is φ = 20210111112100.

The previous prime is 20210111112001. The next prime is 20210111112179. The reversal of 20210111112101 is 10121111101202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17647342363876 + 2562768748225 = 4200874^2 + 1600865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20210111112101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20210111112001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105055556050 + 10105055556051.

It is an arithmetic number, because the mean of its divisors is an integer number (10105055556051).

Almost surely, 2^{20210111112101} is an apocalyptic number.

It is an amenable number.

20210111112101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210111112101 is an equidigital number, since it uses as much as digits as its factorization.

20210111112101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 20210111112101 its reverse (10121111101202), we get a palindrome (30331222213303).

The spelling of 20210111112101 in words is "twenty trillion, two hundred ten billion, one hundred eleven million, one hundred twelve thousand, one hundred one".